Crystal structure of µ-pyrazine-bis(penta-ammineruthenium) penta-(bromide chloride)–water (1/4)

Abstract

The crystal structure of the title compound, [(NH₃)₅Ru·N(CH)₄N·Ru(NH₃)₅] Br_10/3Cl_5/3·4H₂O, has been determined from X-ray diffractometer data by direct methods and refined by full-matrix least squares to R 0.062 for 2 951 observed reflections. Crystals are orthorhombic, probable space group Pnnm, a= 17.790(4), b= 11.590(2), c= 7.096(1)Å, Z= 2. The cation has exact crystallographic symmetry of at least 2, and approximate mmm symmetry; Ru–N(pyrazine) is 2.006(6), Ru–NH₃(trans) 2.127(7), and Ru–NH₃(cis) 2.098(5) and 2.122(5)Å. The anions, together with the water molecules, are highly disordered.